Photoproduction of the rho(0) meson on the proton at large momentum transfer - art. no. 172002

Authors
Battaglieri, M Anciant, E Anghinolfi, M De Vita, R Golovach, E Laget, JM Mokeev, V Ripani, M Adams, G Amaryan, MJ Armstrong, DS Asavapibhop, B Asryan, G Audit, G Auger, T Avakian, H Barrow, S Beard, K Bektasoglu, M Berman, BL Bianchi, N Biselli, AS Boiarinov, S Branford, D Briscoe, WJ Brooks, WK Burkert, VD Calarco, JR Capitani, GP Carman, DS Carnahan, B Cazes, A Cetina, C Cole, PL Coleman, A Cords, D Corvisiero, P Crabb, D Crannell, H Cummings, JP DeSanctis, E Degtyarenko, PV Demirchyan, R Denizli, H Dennis, L Dharmawardane, KV Dhuga, KS Djalali, C Dodge, GE Doughty, D Dragovitsch, P Dugger, M Dytman, S Eckhause, M Egiyan, H Egiyan, KS Elouadrhiri, L Farhi, L Feuerbach, RJ Ficenec, J Forest, TA Freyberger, AP Frolov, V Funsten, H Gaff, SJ Gai, M Gilad, S Gilfoyle, GP Giovanetti, KL Griffioen, K Guidal, M Guillo, M Gyurjyan, V Hancock, D Hardie, J Heddle, D Hersman, FW Hicks, K Hicks, RS Holtrop, M Hyde-Wright, CE Ito, MM Joo, K Kelley, JH Khandaker, M Kim, W Klein, A Klein, FJ Klusman, M Kossov, M Kramer, LH Kuang, Y Kuhn, SE Lawrence, D Lucas, M Lukashin, K Major, RW Manak, JJ Marchand, C McAleer, S McCarthy, J McNabb, JWC Mecking, BA Mestayer, MD Meyer, CA Mikhailov, K Minehart, R Mirazita, M Miskimen, R Muccifora, V Mueller, J Mutchler, GS Napolitano, J Nelson, SO Niczyporuk, BB Niyazov, RA O'Brien, JT Opper, AK Peterson, G Philips, SA Pivnyuk, N Pocanic, D Pogorelko, O Polli, E Preedom, BM Price, JW Protopopescu, D Qin, LM Raue, BA Reolon, AR Riccardi, G Ricco, G Ritchie, BG Ronchetti, F Rossi, P Rowntree, D Rubin, PD Sabourov, K Salgado, C Sanzone-Arenhovel, M Sapunenko, V Schumacher, RA Serov, VS Shafi, A Sharabian, YG Shaw, J Skabelin, AV Smith, ES Smith, T Smith, LC Sober, DI Spraker, M Stavinsky, A Stepanyan, S Stoler, P Taiuti, M Taylor, S Tedeschi, DJ Todor, L Thompson, R Vineyard, MF Vlassov, AV Weinstein, LB Weisberg, A Weller, H Weygand, DP Whisnant, CS Wolin, E Wood, M Yegneswaran, A Yun, J Zhang, B Zhao, J Zhou, Z
Citation
M. Battaglieri et al., Photoproduction of the rho(0) meson on the proton at large momentum transfer - art. no. 172002, PHYS REV L, 8717(17), 2001, pp. 2002
Citations number
29
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
8717
Issue
17
Year of publication
2001
Database
ISI
SICI code
0031-9007(20011022)8717:17<2002:POTRMO>2.0.ZU;2-7
Abstract
The differential cross section, d sigma /dt, for rho (0) meson photoproduct ion on the proton above the resonance region was measured. up to a momentum transfer -t = 5 GeV2 using the CLAS detector at the Thomas Jefferson Natio nal Accelerator Facility. The rho (0) channel was extracted from the measur ed two charged-pion cross sections by fitting the pi (+)pi (-) and p pi (+) invariant masses. The low momentum transfer region shows the typical diffr active pattern expected from Reggeon exchange. The flatter behavior at larg e -t cannot be explained solely in terms of QCD-inspired two-gluon exchange models. The data indicate that other processes, like quark interchange, ar e important to fully describe rho photoproduction.